Shareholders' Equity (Narrative) (Details) - USD ($) shares in Millions, $ in Millions		1 Months Ended			12 Months Ended
	Dec. 31, 2021	Mar. 17, 2022	Feb. 28, 2022	Dec. 31, 2021	Jan. 29, 2022	Mar. 02, 2022	Dec. 29, 2021
Equity, Class of Treasury Stock [Line Items]
Stock repurchased and retired during period					$ 0
Treasury Stock
Equity, Class of Treasury Stock [Line Items]
Stock repurchased and retired during period					(200)
Paid-in Capital
Equity, Class of Treasury Stock [Line Items]
Stock repurchased and retired during period					8
Retained Earnings
Equity, Class of Treasury Stock [Line Items]
Stock repurchased and retired during period					$ 192
ASR Program
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount							$ 250
Stock repurchased and retired during period (in shares)	4.1			4.1
Stock repurchased and retired during period	$ 250
ASR Program | Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Stock repurchased and retired during period (in shares)			0.3
ASR Program | Treasury Stock
Equity, Class of Treasury Stock [Line Items]
Stock repurchased and retired during period	200			$ 200
ASR Program | Treasury Stock | Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Stock repurchased and retired during period			$ 50
ASR Program | Common Stock
Equity, Class of Treasury Stock [Line Items]
Stock repurchased and retired during period				1
ASR Program | Common Stock | Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Stock repurchased and retired during period			1
ASR Program | Paid-in Capital
Equity, Class of Treasury Stock [Line Items]
Stock repurchased and retired during period	$ 50			8
ASR Program | Paid-in Capital | Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Stock repurchased and retired during period			1
ASR Program | Retained Earnings
Equity, Class of Treasury Stock [Line Items]
Stock repurchased and retired during period				$ 192
ASR Program | Retained Earnings | Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Stock repurchased and retired during period			$ 50
March 2022 Share Repurchase Program | Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount						$ 250
Stock repurchased and retired during period (in shares)		0.8
Stock repurchased and retired during period		$ 39