Consolidated Statements of Total Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Beginning Balances, shares		368,431,454
Ending Balances, shares	363,537,810
Cash dividends declared per common share (in dollars per share)	$ 0.175	$ 0.175	$ 0.15	$ 0.15
Common Stock [Member]
Beginning Balances, shares	366,273,190	368,431,454	373,242,060	376,261,635
Exercise of stock options	310,032	258,800	831,489	806,817
Stock issued under employee benefit plans	954,588	582,936	1,059,415	273,608
Repurchases of common stock	(4,000,000)	(3,000,000)	(2,000,000)	(4,100,000)
Ending Balances, shares	363,537,810	366,273,190	373,132,964	373,242,060
Cash dividends declared per common share (in dollars per share)	$ 0.175	$ 0.175	$ 0.15	$ 0.15