Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 1,430	$ 1,422	$ 1,431
Adjustments to reconcile net income to cash provided by operating activities:
Gain from sales of businesses and investments, net	(39)	(81)	(44)
Depreciation of fixed assets	232	229	242
Amortization of intangible assets	277	314	352
Share-based compensation expense	331	340	328
Deferred income taxes	(24)	(223)	(135)
Change in assets and liabilities:
Fiduciary receivables	594	599	(19)
Short-term investments — funds held on behalf of clients	(598)	350	(403)
Fiduciary liabilities	4	(949)	422
Receivables, net	(86)	(83)	(25)
Accounts payable and accrued liabilities	64	87	4
Current income taxes	49	116	42
Pension, other post-retirement and other post-employment liabilities	42	(230)	(340)
Other assets and liabilities	50	118	(43)
CASH PROVIDED BY OPERATING ACTIVITIES	2,326	2,009	1,812
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from investments	43	220	52
Payments for investments	(64)	(266)	(20)
Net sales (purchases) of short-term investments — non-fiduciary	61	9	110
Acquisition of businesses, net of cash acquired	(879)	(16)	(479)
Proceeds from sale of businesses	107	205	48
Capital expenditures	(222)	(290)	(256)
CASH USED FOR INVESTING ACTIVITIES	(954)	(138)	(545)
CASH FLOWS FROM FINANCING ACTIVITIES
Share repurchase	(1,257)	(1,550)	(2,250)
Issuance of shares for employee benefit plans	(129)	(30)	(105)
Issuance of debt	3,467	5,351	5,239
Repayment of debt	(2,945)	(5,098)	(3,918)
Cash dividends to shareholders	(345)	(323)	(273)
Noncontrolling interests and other financing activities	(77)	(39)	4
CASH USED FOR FINANCING ACTIVITIES	(1,286)	(1,689)	(1,303)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	(39)	(172)	(67)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	47	10	(103)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	384	374	477
CASH AND CASH EQUIVALENTS AT END OF YEAR	431	384	374
Supplemental disclosures:
Interest paid	272	254	245
Income taxes paid, net of refunds	$ 218	$ 249	$ 337