Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	$ 1,133	$ 637
Acquisitions	98	598
Dispositions	(10)
Impairment	(24)
Reclassifications	0	(91)
Other (primarily Fx)	(14)	(11)
Ending balance	1,183	1,133	$ 637
Finite-lived Intangible Assets, Accumulated Amortization [Roll Forward]
Accumulated amortization, Beginning balance	324	326
Current year amortization	96	67	48
Dispositions	(7)
Impairment	(12)
Reclassifications	0	(64)
Other (primarily Fx)	(10)	(5)
Accumulated amortization, Ending balance	391	324	326
Net amount	792	809
Databases and software
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	510	113
Acquisitions	0	421
Dispositions	0
Impairment	(2)
Reclassifications	0	(19)
Other (primarily Fx)	(2)	(5)
Ending balance	506	510	113
Finite-lived Intangible Assets, Accumulated Amortization [Roll Forward]
Accumulated amortization, Beginning balance	88	88
Current year amortization	47	20
Dispositions	0
Impairment	(2)
Reclassifications	2	(18)
Other (primarily Fx)	(3)	(2)
Accumulated amortization, Ending balance	132	88	88
Net amount	374	422
Content
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	139	139
Acquisitions	0	0
Dispositions	0
Impairment	0
Reclassifications	0	0
Other (primarily Fx)	0	0
Ending balance	139	139	139
Finite-lived Intangible Assets, Accumulated Amortization [Roll Forward]
Accumulated amortization, Beginning balance	73	59
Current year amortization	14	14
Dispositions	0
Impairment	0
Reclassifications	0	0
Other (primarily Fx)	0	0
Accumulated amortization, Ending balance	87	73	59
Net amount	52	66
Customer relationships
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	168	228
Acquisitions	0	0
Dispositions	0
Impairment	0
Reclassifications	165	(62)
Other (primarily Fx)	(3)	2
Ending balance	330	168	228
Finite-lived Intangible Assets, Accumulated Amortization [Roll Forward]
Accumulated amortization, Beginning balance	60	80
Current year amortization	21	9
Dispositions	0
Impairment	0
Reclassifications	5	(30)
Other (primarily Fx)	(2)	1
Accumulated amortization, Ending balance	84	60	80
Net amount	246	108
Tradenames
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	47	46
Acquisitions	0	0
Dispositions	(2)
Impairment	0
Reclassifications	1	(2)
Other (primarily Fx)	(1)	3
Ending balance	45	47	46
Finite-lived Intangible Assets, Accumulated Amortization [Roll Forward]
Accumulated amortization, Beginning balance	36	35
Current year amortization	2	2
Dispositions	(1)
Impairment	0
Reclassifications	0	(2)
Other (primarily Fx)	(1)	1
Accumulated amortization, Ending balance	36	36	35
Net amount	9	11
Other intangibles
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	269	111
Acquisitions	98	177
Dispositions	(8)
Impairment	(22)
Reclassifications	(166)	(8)
Other (primarily Fx)	(8)	(11)
Ending balance	163	269	111
Finite-lived Intangible Assets, Accumulated Amortization [Roll Forward]
Accumulated amortization, Beginning balance	67	64
Current year amortization	12	22
Dispositions	(6)
Impairment	(10)
Reclassifications	(7)	(14)
Other (primarily Fx)	(4)	(5)
Accumulated amortization, Ending balance	52	67	$ 64
Net amount	$ 111	$ 202