Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Revenue	$ 1,341	$ 1,273
Expenses:
Operating-related expenses	457	410
Selling and general expenses	330	329
Depreciation	18	22
Amortization of intangibles	24	11
Total expenses	829	772
Operating profit	512	501
Interest expense, net	40	16
Income before taxes on income	472	485
Provision for taxes on income	149	156
Net income	323	329
Less: net income attributable to noncontrolling interests	(29)	(26)
Net income	$ 294	$ 303
Net income:
Basic (in dollars per share)	$ 1.11	$ 1.11
Diluted (in dollars per share)	$ 1.10	$ 1.10
Weighted-average number of common shares outstanding:
Basic (in shares)	265.0	273.5
Diluted (in shares)	267.2	276.3
Actual shares outstanding at period end (in shares)	264.5	273.6
Dividend declared per common share (in dollars per share)	$ 0.36	$ 0.33