Fair Value Measurements	3 Months Ended
Mar. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The Company applies fair value accounting for all assets and liabilities that are recognized or disclosed at fair value in its consolidated financial statements on a recurring basis. Fair value represents the amount that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities, the Company considers the principal or most advantageous market and the market-based risk measurements or assumptions that market participants would use in pricing the asset or liability. The fair values of cash equivalents, trade accounts receivable, settlement assets and obligations, accounts payable, and client deposits approximate their respective carrying values due to the short period of time to maturity. The estimated fair value of total debt was based on quoted prices in active markets for the Company’s senior notes (level 1 of the fair value hierarchy). The fair value of the Company’s revolving credit facility borrowings approximates carrying value as the underlying interest rate is variable based on LIBOR. The estimated fair value of total debt was $6.0 billion at both March 31, 2019 and December 31, 2018. The estimated fair value of the treasury lock agreements (“Treasury Locks”) was based on forward U.S. Treasury interest rates (level 2 of the fair value hierarchy), which totaled $35 million at March 31, 2019 (see Note 16). The estimated fair value of the contingent consideration liability of $12 million at March 31, 2019 related to the acquisition of Elan (see Note 4) was based on the present value of a probability-weighted assessment approach derived from the likelihood of achieving the earn-out criteria (level 3 of the fair value hierarchy). This estimated fair value has not changed since the acquisition date. The aggregate fair values of the Company’s debt guarantee arrangements (see Note 6) with the Lending Joint Ventures approximate the $28 million carrying values at March 31, 2019 (level 3 of the fair value hierarchy). The contingent consideration and debt guarantee liabilities are reported primarily in other long-term liabilities in the consolidated balance sheets.

Fair Value Measurements

The Company applies fair value accounting for all assets and liabilities that are recognized or disclosed at fair value in its consolidated financial statements on a recurring basis. Fair value represents the amount that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities, the Company considers the principal or most advantageous market and the market-based risk measurements or assumptions that market participants would use in pricing the asset or liability.

The fair values of cash equivalents, trade accounts receivable, settlement assets and obligations, accounts payable, and client deposits approximate their respective carrying values due to the short period of time to maturity. The estimated fair value of total debt was based on quoted prices in active markets for the Company’s senior notes (level 1 of the fair value hierarchy). The fair value of the Company’s revolving credit facility borrowings approximates carrying value as the underlying interest rate is variable based on LIBOR. The estimated fair value of total debt was $6.0 billion at both March 31, 2019 and December 31, 2018. The estimated fair value of the treasury lock agreements (“Treasury Locks”) was based on forward U.S. Treasury interest rates (level 2 of the fair value hierarchy), which totaled $35 million at March 31, 2019 (see Note 16).

The estimated fair value of the contingent consideration liability of $12 million at March 31, 2019 related to the acquisition of Elan (see Note 4) was based on the present value of a probability-weighted assessment approach derived from the likelihood of achieving the earn-out criteria (level 3 of the fair value hierarchy). This estimated fair value has not changed since the acquisition date. The aggregate fair values of the Company’s debt guarantee arrangements (see Note 6) with the Lending Joint Ventures approximate the $28 million carrying values at March 31, 2019 (level 3 of the fair value hierarchy). The contingent consideration and debt guarantee liabilities are reported primarily in other long-term liabilities in the consolidated balance sheets.