Equity - Shares or Units Activity (Details) $ / shares in Units, $ in Billions		3 Months Ended
	Feb. 13, 2017	Mar. 31, 2017 item $ / shares shares	Mar. 31, 2016 shares	Apr. 02, 2015 USD ($)
Equity
Stock repurchase program, extension period	2 years
Shares repurchased (in shares)		870,692	0
Average share price repurchased (in dollars per share) | $ / shares		$ 174.22
Limited Partners
Equity
Exchange of limited partner units, (in shares)		893
Number of limited partners who received common stock | item		1
Maximum
Equity
Common stock authorized for repurchase | $				$ 2.0