Subsequent Events (Notes)	3 Months Ended
Jun. 30, 2018
Subsequent Events [Abstract]
AMS Acquisition	Subsequent Events On July 2, 2018, we entered into a Membership Interest Purchase Agreement (the “Purchase Agreement”) with Acxiom Corporation (“Acxiom”), LiveRamp, Inc., a wholly owned subsidiary of Acxiom, and Acxiom Holdings, Inc. Upon satisfaction of the terms and subject to the conditions set forth in the Purchase Agreement, we will acquire the Acxiom Marketing Solutions business for $2,300.0 in cash, subject to customary adjustments (the “AMS Acquisition”). The consummation of the transaction is subject to customary closing conditions, including, among other things, approval of Acxiom’s stockholders, certain regulatory approvals and completion of a series of internal Acxiom reorganization transactions. The transaction is anticipated to close in the fourth quarter of 2018. As previously disclosed, we have entered into a commitment letter with Citigroup Global Markets, Inc. (on behalf of various Citi affiliates) and JPMorgan Chase Bank, N.A. (the “Commitment Parties”), dated as of July 2, 2018, pursuant to which, subject to certain terms and conditions, the Commitment Parties have agreed to provide a 364-day senior unsecured bridge loan facility in an aggregate principal amount of up to $2,300.0 to fund the consideration for the AMS Acquisition (the "Bridge Facility"). We expect that, prior to the consummation of the AMS Acquisition, we will enter into debt financing arrangements with third-party lenders and engage in debt securities offerings, which will be used to fund the AMS Acquisition and related expenses in lieu of funding under the Bridge Facility. The commitment with respect to the Bridge Facility is subject to certain customary closing conditions, including the consummation of the AMS Acquisition in accordance with the terms of the Purchase Agreement.

Subsequent Events

On July 2, 2018, we entered into a Membership Interest Purchase Agreement (the “Purchase Agreement”) with Acxiom Corporation (“Acxiom”), LiveRamp, Inc., a wholly owned subsidiary of Acxiom, and Acxiom Holdings, Inc. Upon satisfaction of the terms and subject to the conditions set forth in the Purchase Agreement, we will acquire the Acxiom Marketing Solutions business for $2,300.0 in cash, subject to customary adjustments (the “AMS Acquisition”). The consummation of the transaction is subject to customary closing conditions, including, among other things, approval of Acxiom’s stockholders, certain regulatory approvals and completion of a series of internal Acxiom reorganization transactions. The transaction is anticipated to close in the fourth quarter of 2018.

As previously disclosed, we have entered into a commitment letter with Citigroup Global Markets, Inc. (on behalf of various Citi affiliates) and JPMorgan Chase Bank, N.A. (the “Commitment Parties”), dated as of July 2, 2018, pursuant to which, subject to certain terms and conditions, the Commitment Parties have agreed to provide a 364-day senior unsecured bridge loan facility in an aggregate principal amount of up to $2,300.0 to fund the consideration for the AMS Acquisition (the "Bridge Facility"). We expect that, prior to the consummation of the AMS Acquisition, we will enter into debt financing arrangements with third-party lenders and engage in debt securities offerings, which will be used to fund the AMS Acquisition and related expenses in lieu of funding under the Bridge Facility. The commitment with respect to the Bridge Facility is subject to certain customary closing conditions, including the consummation of the AMS Acquisition in accordance with the terms of the Purchase Agreement.