Common, Preferred and Treasury Stock - Treasury Stock (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2019	Jun. 30, 2019
Stockholders' Equity Note [Abstract]
Number of shares authorized to be repurchased			100,000,000
Accelerated Share Repurchases [Line Items]
Amount	$ 1,393	$ 1,763
January 26, 2021 ASR
Accelerated Share Repurchases [Line Items]
Amount	$ 180
Shares Repurchased on Repurchase Date	4,951,456
Shares Received from Forward Contract  Settlement	366,939
Total Shares Repurchased	5,318,395
April 23, 2021 ASR
Accelerated Share Repurchases [Line Items]
Amount	$ 347
Shares Repurchased on Repurchase Date	7,894,807
Shares Received from Forward Contract  Settlement	675,295
Total Shares Repurchased	8,570,102
July 27, 2021 ASR
Accelerated Share Repurchases [Line Items]
Amount	$ 550
Shares Repurchased on Repurchase Date	13,065,958
Shares Received from Forward Contract  Settlement	1,413,211
Total Shares Repurchased	14,479,169
Notional amount	$ 275
October 29, 2021 ASR
Accelerated Share Repurchases [Line Items]
Amount	$ 316
Shares Repurchased on Repurchase Date	6,211,841
Shares Received from Forward Contract  Settlement	1,072,572
Total Shares Repurchased	7,284,413