Summary of Significant Accounting Policies (Basic and Diluted EPS Calculation for Continuing Operations) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Net income before non-controlling interests	$ 3,174	$ 2,046	$ 1,773
Less: Net income attributable to non-controlling interests	31	30	31
Net income attributable to the Company	$ 3,143	$ 2,016	$ 1,742
Basic weighted average common shares outstanding (in shares)	507	506	506
Dilutive effect of potentially issuable common shares (in shares)	6	6	5
Diluted weighted average common shares outstanding (in shares)	513	512	511
Average stock price used to calculate common stock equivalents (in dollars per share)	$ 141.57	$ 109.12	$ 97.23