Income Taxes	6 Months Ended
Jun. 30, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Our effective tax rate was 30% and 27% for the six months ended June 30, 2016 and 2015, respectively, and 30% and 27% for the three months ended June 30, 2016 and 2015. The effective tax rates for the six months and three months ended June 30, 2016 and 2015 were lower than the federal statutory rate primarily due to favorable foreign income tax rate differentials, partially offset by state income taxes. The favorable foreign income tax rate differential results primarily from lower tax rates in the U.K. The effective tax rates for the six months and three months ended June 30, 2016 are higher than the effective tax rate for the comparable periods in 2015 primarily due to a mix of foreign versus U.S. based income and an increase to deferred income taxes in the current year, partially offset by the tax benefit from the early adoption of ASU 2016-09 (Note 2). Our non-U.S. subsidiaries had $3.3 billion in cumulative undistributed earnings as of June 30, 2016. This amount represents the post-income tax earnings under GAAP adjusted for previously taxed income. The earnings from our non-U.S. subsidiaries are considered to be indefinitely reinvested. Accordingly, no provision for U.S. federal and state income taxes has been made in the accompanying consolidated financial statements. Further, a determination of the unrecognized deferred tax liability is not practicable. Any future distribution by way of dividend of these non-U.S. earnings may subject us to both U.S. federal and state income taxes, as adjusted for non-U.S. tax credits, and withholding taxes payable to various non-U.S. countries.

Income Taxes

6 Months Ended

Jun. 30, 2016

Our effective tax rate was 30% and 27% for the six months ended June 30, 2016 and 2015, respectively, and 30% and 27% for the three months ended June 30, 2016 and 2015. The effective tax rates for the six months and three months ended June 30, 2016 and 2015 were lower than the federal statutory rate primarily due to favorable foreign income tax rate differentials, partially offset by state income taxes. The favorable foreign income tax rate differential results primarily from lower tax rates in the U.K. The effective tax rates for the six months and three months ended June 30, 2016 are higher than the effective tax rate for the comparable periods in 2015 primarily due to a mix of foreign versus U.S. based income and an increase to deferred income taxes in the current year, partially offset by the tax benefit from the early adoption of ASU 2016-09 (Note 2).

Our non-U.S. subsidiaries had $3.3 billion in cumulative undistributed earnings as of June 30, 2016. This amount represents the post-income tax earnings under GAAP adjusted for previously taxed income. The earnings from our non-U.S. subsidiaries are considered to be indefinitely reinvested. Accordingly, no provision for U.S. federal and state income taxes has been made in the accompanying consolidated financial statements. Further, a determination of the unrecognized deferred tax liability is not practicable. Any future distribution by way of dividend of these non-U.S. earnings may subject us to both U.S. federal and state income taxes, as adjusted for non-U.S. tax credits, and withholding taxes payable to various non-U.S. countries.