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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($)
$ in Millions
Sep. 30, 2019
Dec. 31, 2018
Sep. 30, 2018
Cash and cash equivalents at beginning of period $ 1,495.3 $ 2,196.3 $ 2,005.8
Cash and cash equivalents at ending of period 2,294.1 1,495.3 2,196.3
Consolidated T. Rowe Price investment products [Member]      
Cash and cash equivalents at beginning of period 70.1 105.7 103.1
Cash and cash equivalents at ending of period $ 80.9 $ 70.1 $ 105.7