Debt (Interest Rates) (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Japan | Short-term term loans, variable rate | Subsidiary Term Loans
Debt Instrument [Line Items]
Interest rate at end of period (as a percent)	0.24%	0.29%
China | Term Loan, SOFR Plus 0.75% Due March 2024 | Subsidiary Term Loans
Debt Instrument [Line Items]
Interest rate at end of period (as a percent)	0.00%	5.83%
China | Term Loan, SOFR Plus 0.75% Due March 2024 | Subsidiary Term Loans | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Interest rate spread (as a percent)	0.75%
China | Term Loan, SOFR Plus 0.75% Due June 2025 | Subsidiary Term Loans
Debt Instrument [Line Items]
Interest rate at end of period (as a percent)	6.07%	5.55%
China | Term Loan, SOFR Plus 0.75% Due June 2025 | Subsidiary Term Loans | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Interest rate spread (as a percent)	0.75%
China | Term Loan, SOFR Plus 0.75% Due 2025 | Subsidiary Term Loans
Debt Instrument [Line Items]
Interest rate at end of period (as a percent)	6.07%	5.48%
China | Term Loan, SOFR Plus 0.75% Due 2025 | Subsidiary Term Loans | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Interest rate spread (as a percent)	0.75%
China | Term Loans, SOFR Plus 1.40%, Due December 2026 | Subsidiary Term Loans
Debt Instrument [Line Items]
Interest rate at end of period (as a percent)	6.76%	0.00%
China | Term Loans, SOFR Plus 1.40%, Due December 2026 | Subsidiary Term Loans | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Interest rate spread (as a percent)	1.40%