Annual report pursuant to Section 13 and 15(d)

PARENT-ONLY FINANCIAL STATEMENTS - Cash Flow Statement (Details)

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PARENT-ONLY FINANCIAL STATEMENTS - Cash Flow Statement (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Operating activities      
Net income $ 817 $ 1,411 $ 1,393
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 367 386 493
Net cash provided by (used in) operating activities 1,323 1,574 1,726
Investing activities      
Sales of available-for-sale securities 392 3,903 1,419
Cash paid for acquisitions, net of cash received 0 0 (15)
Net cash provided by (used in) investing activities (8,639) (1,877) (3,663)
Financing activities      
Repayments of Long-term Debt (3,052) (743) (2,798)
Net proceeds from issuance of medium-term notes (2,373) 586 (3,025)
Net proceeds from issuance of preferred stock 988 0 495
Repurchases of common stock (92) (441) (939)
Other, net (1) (2) (5)
Net cash provided by (used for) financing activities 12,741 (1,199) 3,089
Increase (decrease) in cash and cash equivalents 5,425 (1,502) 1,152
Cash and cash equivalents at beginning of period 1,170 2,672 1,520
Cash and cash equivalents at end of period 6,595 1,170 2,672
Supplemental Cash Flow Information [Abstract]      
Interest paid 453 989 742
Parent      
Operating activities      
Net income 817 1,411 1,393
Adjustments to reconcile net income to net cash provided by operating activities:      
Equity in undistributed net income of subsidiaries 553 (942) 197
Depreciation and amortization 0 (2) (2)
Other, net 89 (19) 121
Net cash provided by (used in) operating activities 1,459 448 1,709
Investing activities      
Repayments from subsidiaries 8 701 21
Advances to subsidiaries (256) (11) (13)
Sales of available-for-sale securities (1) (38) 0
Cash paid for acquisitions, net of cash received 0 0 (15)
Net cash provided by (used in) investing activities (249) 652 (7)
Financing activities      
Repayments of Short-term Debt 0 0 (400)
Repayments of Long-term Debt (800) 0 0
Net proceeds from issuance of medium-term notes 747 797 501
Net proceeds from issuance of long-term borrowings (698) (671) (584)
Net proceeds from issuance of preferred stock 988 0 495
Repurchases of common stock (92) (441) (939)
Other, net 8 18 41
Net cash provided by (used for) financing activities 137 (333) (968)
Increase (decrease) in cash and cash equivalents 1,347 767 734
Cash and cash equivalents at beginning of period 3,119 2,352 1,618
Cash and cash equivalents at end of period 4,466 3,119 2,352
Supplemental Cash Flow Information [Abstract]      
Interest paid $ 113 $ 135 $ 126