Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	1 Months Ended	9 Months Ended	12 Months Ended
	Apr. 30, 2021	Sep. 30, 2021	Dec. 31, 2020
LSC Communications
Loss Contingencies [Line Items]
Charges incurred MEPP obligation			$ 19.0
Loss contingency accrual		$ 5.8	15.2
Non Income Tax [Member]
Loss Contingencies [Line Items]
Loss contingency accrual		3.7	5.2
LSC Communications
Loss Contingencies [Line Items]
Future cash payment on MEPP liabilities, total			103.0
Present value of MEPP liabilities			$ 57.0
Blended discount rate on MEPP liabilties			10.00%
Term of future cash payment on MEPP liabilities			15 years
Settlement of MEPP liabilities	$ 59.0
Minimum [Member] | LSC Communications
Loss Contingencies [Line Items]
Future cash payment on MEPP liabilities per annum		1.6
Maximum | LSC Communications
Loss Contingencies [Line Items]
Future cash payment on MEPP liabilities per annum		$ 8.5