Total Equity and Other Comprehensive Income (Dividends per Share) (Details) - $ / shares		3 Months Ended
	Apr. 01, 2021	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Sep. 01, 2020
Class of Stock [Line Items]
Common stock held in treasury at cost (shares)		118,000,000		119,000,000
Common Stock
Class of Stock [Line Items]
Cash dividends declared, Common, per share (in dollars per share)		$ 1.15	$ 1.15
Common Stock | Subsequent Event
Class of Stock [Line Items]
Cash dividends declared, Common, per share (in dollars per share)	$ 1.15
Series B
Class of Stock [Line Items]
Cash dividends declared, Preferred, per share (in dollars per share)		0.45	0.45
Series O
Class of Stock [Line Items]
Cash dividends declared, Preferred, per share (in dollars per share)		3,375	3,375
Series P
Class of Stock [Line Items]
Cash dividends declared, Preferred, per share (in dollars per share)		$ 1,531	1,531
Series Q
Class of Stock [Line Items]
Cash dividends declared, Preferred, per share (in dollars per share)			$ 1,344
Treasury stock, preferred (shares)					4,800
Depositary Shares
Class of Stock [Line Items]
Common stock held in treasury at cost (shares)					19,200,000