Per Share Data (Basic and Diluted EPS Calculation Continuing Operations) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Net income before non-controlling interests	$ 344	$ 536	$ 1,071	$ 1,232
Less: Net income attributable to non-controlling interests	12	5	23	11
Net income attributable to the Company	$ 332	$ 531	$ 1,048	$ 1,221
Basic weighted average common shares outstanding (in shares)	507	507	506	507
Dilutive effect of potentially issuable common shares (in shares)	5	5	5	6
Diluted weighted average common shares outstanding (in shares)	512	512	511	513
Average stock price used to calculate common stock equivalents (in dollars per share)	$ 95.74	$ 81.64	$ 92.14	$ 82.24